Position Independant Code vs Relocatable code

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What is exactly the difference between the position independant code and Relocatable code. Who is responsible for generating the position independant code(PIC) and Relocatable code(say compiler/linker/loader). Does all compiler/linker supports PIC generation and relocation?

Posted 23-Aug-15 4:15am

chandrAN2&

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OriginalGriff · Answer 1 · 2015-08-23T04:41:00

"What is exactly the difference between the position independant code and Relocatable code."
If in doubt, ask Wikipedia: https://en.wikipedia.org/wiki/Position-independent_code[^]
" position-independent code (PIC) or position-independent executable (PIE) is a body of machine code that, being placed somewhere in the primary memory, executes properly regardless of its absolute address
...
This differs from relocatable code, in which a link editor or program loader modifies a program before execution so it can be run only from a particular memory location. "

Does all compiler/linker supports PIC generation and relocation?
No.
Modern ones do, but very old ones may not.